Hi,
Please open this page again:
www.flexiblewebdesign.com/Virtuemart-Extensions/Virtuemart-Flexible-Drop-Down-Shopping-Cart
IF you didn't see the red warning that states that the extension is only for VM1.1.9 and doesn't work with VM2.0.xx, I am sorry but there is nothing i can do about it.
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But no worry, either this week, or the following week. The dropdown shopping cart module will be updated and it will start working alright with VM2.0.xx as well, and you can get the updated version for free. So... stay tuned. ("like" our FacebokFun page, we are posting news in our page when there is a new extension comes out or when the existing ones is updated.)
Regards.
Support & Development.